101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/* Test program for reading and writing out the same file in-place
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Copyright (C) 2019 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include ELFUTILS_HEADER(elf)
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#include <gelf.h>
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int
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main (int argc, const char *argv[])
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{
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/* Takes the given file, and create a new identical one. */
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if (argc != 2)
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{
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fprintf (stderr, "elfrdwrnop elf-file\n");
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exit (1);
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}
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elf_version (EV_CURRENT);
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const char *name = argv[1];
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printf ("elfrdwrdnop %s\n", name);
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int fd = open (name, O_RDWR);
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if (fd < 0)
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{
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fprintf (stderr, "Couldn't open file '%s': %s\n",
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name, strerror (errno));
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exit (1);
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}
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Elf *elf = elf_begin (fd, ELF_C_RDWR, NULL);
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if (elf == NULL)
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{
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fprintf (stderr, "Couldn't open ELF file '%s': %s\n",
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name, elf_errmsg (-1));
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exit (1);
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}
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/* Write everything to disk. If there are any phdrs, then we want
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the exact same layout. */
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size_t phnum;
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if (elf_getphdrnum (elf, &phnum) != 0)
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{
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printf ("cannot get phdrs: %s\n", elf_errmsg (-1));
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exit (1);
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}
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if (phnum > 0)
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elf_flagelf (elf, ELF_C_SET, ELF_F_LAYOUT);
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if (elf_update (elf, ELF_C_WRITE) < 0)
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{
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printf ("failure in elf_update: %s\n", elf_errmsg (-1));
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exit (1);
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}
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if (elf_end (elf) != 0)
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{
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printf ("couldn't cleanup elf '%s': %s\n", name, elf_errmsg (-1));
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exit (1);
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}
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if (close (fd) != 0)
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{
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printf ("couldn't close '%s': %s\n", name, strerror (errno));
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exit (1);
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}
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return 0;
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}
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